Nitrogen-Doped Carbon Dots Modified Fe-Co Sulfide Nanosheets as High-Efficiency Electrocatalysts toward Oxygen Evolution Reaction

Lei Wu; Hanli Qin; Zhenyuan Ji; Hu Zhou; Xiaoping Shen; Guoxing Zhu; Aihua Yuan

doi:10.1002/smll.202305965

Nitrogen-Doped Carbon Dots Modified Fe-Co Sulfide Nanosheets as High-Efficiency Electrocatalysts toward Oxygen Evolution Reaction

Small. 2024 Jan;20(4):e2305965. doi: 10.1002/smll.202305965. Epub 2023 Sep 13.

Authors

Lei Wu¹, Hanli Qin¹, Zhenyuan Ji¹, Hu Zhou², Xiaoping Shen¹, Guoxing Zhu¹, Aihua Yuan²

Affiliations

¹ School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
² School of Environmental and Chemical Engineering, School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China.

PMID: 37702142
DOI: 10.1002/smll.202305965

Abstract

Developing high-efficiency and stable oxygen evolution reaction (OER) electrocatalysts is an imperative requirement to produce green and clean hydrogen energy. In this work, the FeCoS_y /NCDs composite with nitrogen-doped carbon dots (NCDs) modified Fe-Co sulfide (FeCoS_y ) nanosheets is prepared by using a facile and mild one-pot solvothermal method. Benefiting from the low crystallinity and the synergistic effect between FeCoS_y and NCDs, the optimal FeCoS_y /NCDs-3 composite exhibits an overpotential of only 284 mV at 10 mA cm^-2 , a small Tafel value of 52.1 mV dec^-1 , and excellent electrochemical durability in alkaline solution. Remarkably, unlike ordinary metal sulfide electrocatalysts, the morphology, components, and structure of the FeCoS_y /NCDs composite can be well retained after OER test. The NCDs modified FeCoS_y composite with excellent electrocatalytic performance provides an effective approach to boost metal sulfide electrocatalysts for practical application.

Keywords: electrocatalysts; metal sulfide; nitrogen-doped carbon dots; oxygen evolution reaction; synergistic effect.

Abstract

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